Add editor setting for FPS mode and compat

doc/classes/EditorSettings.xml

@@ -520,6 +520,12 @@
 		<member name="editors/animation/default_create_reset_tracks" type="bool" setter="" getter="">
 			If [code]true[/code], create a [code]RESET[/code] track when creating a new animation track. This track can be used to restore the animation to a "default" state.
 		</member>
+		<member name="editors/animation/default_fps_compatibility" type="bool" setter="" getter="">
+			Controls whether [AnimationPlayer] will apply snapping to nearest integer FPS when snapping is in Seconds mode. The option is remembered locally for a scene and this option only determines the default value when scene doesn't have local state yet.
+		</member>
+		<member name="editors/animation/default_fps_mode" type="int" setter="" getter="">
+			Default step mode for [AnimationPlayer] (seconds or FPS). The option is remembered locally for a scene and this option only determines the default value when scene doesn't have local state yet.
+		</member>
 		<member name="editors/animation/onion_layers_future_color" type="Color" setter="" getter="">
 			The modulate color to use for "future" frames displayed in the animation editor's onion skinning feature.
 		</member>

editor/animation_track_editor.cpp

@@ -3894,6 +3894,7 @@ bool AnimationTrackEditor::has_keying() const {
 Dictionary AnimationTrackEditor::get_state() const {
 	Dictionary state;
 	state["fps_mode"] = timeline->is_using_fps();
+	state["fps_compat"] = fps_compat->is_pressed();
 	state["zoom"] = zoom->get_value();
 	state["offset"] = timeline->get_value();
 	state["v_scroll"] = scroll->get_v_scroll_bar()->get_value();
@@ -3909,27 +3910,34 @@ void AnimationTrackEditor::set_state(const Dictionary &p_state) {
 			snap_mode->select(0);
 		}
 		_snap_mode_changed(snap_mode->get_selected());
-	} else {
-		snap_mode->select(0);
-		_snap_mode_changed(snap_mode->get_selected());
 	}
+
+	if (p_state.has("fps_compat")) {
+		fps_compat->set_pressed(p_state["fps_compat"]);
+	}
+
 	if (p_state.has("zoom")) {
 		zoom->set_value(p_state["zoom"]);
-	} else {
-		zoom->set_value(1.0);
 	}
+
 	if (p_state.has("offset")) {
 		timeline->set_value(p_state["offset"]);
-	} else {
-		timeline->set_value(0);
 	}
+
 	if (p_state.has("v_scroll")) {
 		scroll->get_v_scroll_bar()->set_value(p_state["v_scroll"]);
-	} else {
-		scroll->get_v_scroll_bar()->set_value(0);
 	}
 }
 
+void AnimationTrackEditor::clear() {
+	snap_mode->select(EDITOR_GET("editors/animation/default_fps_mode"));
+	_snap_mode_changed(snap_mode->get_selected());
+	fps_compat->set_pressed(EDITOR_GET("editors/animation/default_fps_compatibility"));
+	zoom->set_value(1.0);
+	timeline->set_value(0);
+	scroll->get_v_scroll_bar()->set_value(0);
+}
+
 void AnimationTrackEditor::cleanup() {
 	set_animation(Ref<Animation>(), read_only);
 }
@@ -7704,9 +7712,9 @@ AnimationTrackEditor::AnimationTrackEditor() {
 	snap_mode = memnew(OptionButton);
 	snap_mode->add_item(TTR("Seconds"));
 	snap_mode->add_item(TTR("FPS"));
+	snap_mode->set_disabled(true);
 	bottom_hf->add_child(snap_mode);
 	snap_mode->connect(SceneStringName(item_selected), callable_mp(this, &AnimationTrackEditor::_snap_mode_changed));
-	snap_mode->set_disabled(true);
 
 	bottom_hf->add_child(memnew(VSeparator));
 

editor/animation_track_editor.h

@@ -916,6 +916,7 @@ public:
 
 	Dictionary get_state() const;
 	void set_state(const Dictionary &p_state);
+	void clear();
 
 	void cleanup();
 

editor/editor_settings.cpp

@@ -899,6 +899,8 @@ void EditorSettings::_load_defaults(Ref<ConfigFile> p_extra_config) {
 	EDITOR_SETTING(Variant::FLOAT, PROPERTY_HINT_RANGE, "editors/polygon_editor/auto_bake_delay", 1.5, "-1.0,10.0,0.01");
 
 	// Animation
+	EDITOR_SETTING(Variant::INT, PROPERTY_HINT_ENUM, "editors/animation/default_fps_mode", 0, "Seconds,FPS");
+	_initial_set("editors/animation/default_fps_compatibility", true);
 	_initial_set("editors/animation/autorename_animation_tracks", true);
 	_initial_set("editors/animation/confirm_insert_track", true, true);
 	_initial_set("editors/animation/default_create_bezier_tracks", false, true);

editor/plugins/animation_player_editor_plugin.cpp

@@ -923,6 +923,10 @@ void AnimationPlayerEditor::set_state(const Dictionary &p_state) {
 	}
 }
 
+void AnimationPlayerEditor::clear() {
+	track_editor->clear();
+}
+
 void AnimationPlayerEditor::_animation_resource_edit() {
 	String current = _get_current();
 	if (current != String()) {

editor/plugins/animation_player_editor_plugin.h

@@ -266,6 +266,7 @@ public:
 	AnimationTrackEditor *get_track_editor() { return track_editor; }
 	Dictionary get_state() const;
 	void set_state(const Dictionary &p_state);
+	void clear();
 
 	void ensure_visibility();
 
@@ -298,6 +299,7 @@ protected:
 public:
 	virtual Dictionary get_state() const override { return anim_editor->get_state(); }
 	virtual void set_state(const Dictionary &p_state) override { anim_editor->set_state(p_state); }
+	virtual void clear() override { anim_editor->clear(); }
 
 	virtual String get_plugin_name() const override { return "Anim"; }
 	bool has_main_screen() const override { return false; }